Measurement of three-dimensional solubility parameters of nonyl phenol ethoxylates using inverse gas chromatography
Measurement of three-dimensional solubility parameters of nonyl phenol ethoxylates using inverse gas chromatography
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DOI：
10.1006/jcis.1996.0266
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发表时间：
1996-06-01
影响因子：
9.9
通讯作者：
Rudin, A
中科院分区：
文献类型：
--
作者：
Choi, P;Kavassalis, T;Rudin, A
这里报道了一种基于反气相色谱（IGC）的新技术，用于测量具有不同环氧乙烷链长度的非离子表面活性剂（壬基酚聚氧乙烯醚）在两种不同温度下的三维溶解度参数。然后可以使用这些溶解度参数来表征表面活性剂的相对油和水亲和力。这些表面活性剂的三维溶解度参数是根据测量的相互作用参数和IGC实验中使用的溶剂（探针分子）的已知三维溶解度参数确定的。特别是，基于正则溶液理论，假设零或负相互作用参数的出现是特定探针和表面活性剂热力学相容性的证据。通过对相容的低分子探针物质对应值进行平均，得到表面活性剂的三维溶解度参数。这样，不需要将溶液的晶格模型（允许溶液的负焓）与溶解度参数理论（仅考虑吸热溶液）相结合，因此，测量的负相互作用参数不会成为获得希尔德布兰德和三维溶解度参数的绊脚石。该方法适用于所有材料的三维溶解度参数的测量。这里使用表面活性剂只是为了方便说明。 (C) 1996 学术出版社
Reported here is a novel technique, based on inverse gas chromatography (IGC), to measure the three-dimensional solubility parameters of nonionic surfactants-nonyl phenol ethoxylates-with different ethylene oxide chain lengths at two different temperatures. These solubility parameters can then be used to characterize the relative oil and water affinities of the surfactant. The three-dimensional solubility parameters of these surfactants were determined on the basis of the measured interaction parameters and known three-dimensional solubility parameters of the solvents (probe molecules) used in the IGC experiments, In particular, it was assumed, based on the regular solution theory, that the occurrence of a zero or negative interaction parameter is evidence of thermodynamic compatibility of the particular probe and surfactant. The three-dimensional solubility parameters of the surfactant are obtained by averaging the corresponding values of the compatible low-molecular-weight probe substances. In this way, combination of the lattice model of solutions (which allows negative enthalpies of solution) and the solubility parameter theory (which accounts for endothermic solutions only) is not required, As a result, measured negative interaction parameters are not a stumbling block for obtaining Hildebrand and three-dimensional solubility parameters. The method described is applicable to measurement of three-dimensional solubility parameters of all materials. Surfactants were used here as a convenient illustration only. (C) 1996 Academic Press, Inc.